<template>
  <div class="role-container">
    <div class="left-wrapper">
      <div
        v-for="(item, index) in roleList"
        :key="item.roleId"
        class="role-item"
        :class="{active: index === activeIndex}"
        @click="changeRole(index)"
      >
        <div class="role-info">
          <svg-icon :icon-class="index === activeIndex ? 'user-active' : 'user'" class="icon" />
          {{ item.roleName }}
        </div>
        <div class="more">
          <!-- <svg-icon icon-class="more" /> -->
          <el-dropdown>
            <span class="el-dropdown-link">
              <svg-icon icon-class="more" />
            </span>
            <el-dropdown-menu slot="dropdown">
              <el-dropdown-item @click.native="$router.push(`/roleAdd?id=${item.roleId}`)">
                编辑角色
              </el-dropdown-item>
              <el-dropdown-item @click.native="delRole(item.roleId)">删除</el-dropdown-item>
            </el-dropdown-menu>
          </el-dropdown>
        </div>
      </div>
      <el-button class="addBtn" size="mini" @click="$router.push('/roleAdd')">添加角色</el-button>
    </div>
    <!-- 右侧权限和成员 -->
    <div class="right-wrapper">
      <el-tabs v-model="activeName">
        <el-tab-pane label="功能权限" name="tree">
          <div class="tree-wrapper">
            <div v-for="item in treeList" :key="item.id" class="tree-item">
              <div class="tree-title">{{ item.title }}</div>
              <el-tree
                ref="tree"
                :data="item.children"
                node-key="id"
                :props="{ label: 'title' }"
                show-checkbox
                check-strictly
                :default-expand-all="true"
              />
            </div>
          </div>
        </el-tab-pane>
        // 模版渲染
        <el-tab-pane :label="`成员(${roleUserList.length})`" name="member">
          <div class="user-wrapper">
            <el-table
              :data="roleUserList"
            >
              <el-table-column
                type="index"
                width="250"
                label="序号"
              />
              <el-table-column
                prop="name"
                label="员工姓名"
              />
              <el-table-column
                prop="userName"
                label="登录账号"
              />
            </el-table>
          </div>
        </el-tab-pane>
      </el-tabs>
    </div>
  </div>
</template>

<script>
import { delRoleUserAPI, getRoleDetailAPI, getRoleListAPI, getRoleUserAPI, getTreeListAPI } from '@/api/system'

export default {
  name: 'Role',
  data() {
    return {
      roleList: [],
      activeIndex: 0,
      treeList: [], // 权限树形列表
      perms: [], // 当前角色权限点列表
      activeName: 'tree', // 默认打开tree
      roleUserList: [] // 当前角色下的成员列表
    }
  },
  // 生命周期里先以第一项roleId获取
  async mounted() {
  // 先获取角色列表和可选权限列表
    await this.getRoleList()
    await this.getTreeList()
    // 页面加载获取默认选中角色下的权限列表
    this.getRoleDetail(this.roleList[0].roleId)
    // 获取角色成员列表
    this.getRoleUserList(this.roleList[0].roleId)
  },
  methods: {
    delRole(roleId) {
      this.$confirm('是否确认删除当前角色?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(async() => {
        await delRoleUserAPI(roleId)
        this.getRoleList()
        this.$message({
          type: 'success',
          message: '删除成功!'
        })
      })
    },
    async getRoleList() {
      const res = await getRoleListAPI()
      this.roleList = res.data
    },
    // 切换角色
    changeRole(idx) {
      this.activeIndex = idx
      // 获取当前角色下的权限点数据列表
      // 注意角色 id，不是索引
      const roleId = this.roleList[idx].roleId
      this.getRoleDetail(roleId)
      // 获取当前角色下的成员数据列表
      this.getRoleUserList(roleId)
    },
    async getTreeList() {
      const res = await getTreeListAPI()
      this.treeList = res.data
      // 禁用
      // 目标：treeList里面的每一项以及嵌套的子项都添加一个disabled = true
      this.addDisabled(this.treeList)
    },
    // 递归处理函数
    addDisabled(treeList) {
      treeList.forEach(item => {
        item.disabled = true
        // 递归处理
        if (item.children) {
          this.addDisabled(item.children)
        }
      })
    },
    // 封装请求方法
    async getRoleDetail(roleId) {
      const res = await getRoleDetailAPI(roleId)
      this.perms = res.data.perms
      // 高亮权限列表
      const treeComponentList = this.$refs.tree
      // 调用setCheckedKeys方法
      treeComponentList.forEach((tree, index) => {
        tree.setCheckedKeys(this.perms[index])
      })
    },
    // 封装获取当前角色下的成员的方法
    async getRoleUserList(roleId) {
      const res = await getRoleUserAPI(roleId)
      this.roleUserList = res.data.rows
    }
  }
}
</script>

<style scoped lang="scss">
.role-container {
    display: flex;
    font-size: 14px;
    background-color: #fff;

    .left-wrapper {
        width: 200px;
        border-right: 1px solid #e4e7ec;
        padding: 4px;
        text-align: center;

        .role-item {
            position: relative;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            cursor: pointer;

            &.active {
                background: #edf5ff;
                color: #4770ff;
            }
        }

        .role-info {
            display: flex;
            align-items: center;

            .icon {
                margin-right: 10px;
            }
        }

        .more {
            display: flex;
            align-items: center;
        }

        .addBtn {
            width: 100%;
            margin-top: 20px;
        }
    }

    .right-wrapper {
        flex: 1;

        .tree-wrapper {
            display: flex;
            justify-content: space-between;

            .tree-item {
                flex: 1;
                border-right: 1px solid #e4e7ec;
                padding: 0px 4px;
                text-align: center;

                .tree-title {
                    background: #f5f7fa;
                    text-align: center;
                    padding: 10px 0;
                    margin-bottom: 12px;
                }
            }
        }

        ::v-deep .el-tabs__nav-wrap {
            padding-left: 20px;
        }

        .user-wrapper {
            padding: 20px;
        }
    }
}
</style>
